Boring-brace.



D. RBDMON.

BORING BRAGE. APPLIOATION FILED' J11N-25, 1912.

1,029,028; rammed June 11, 1912.

. nrriLaRDnnEn-iaoivfaor 'Be 'it known 'naar Diagrammes,

citizen offthe-United States, residing at WYaShingtOn, in the `,Di'strict of j Columbia,

`have invented a new and useful Boring- Brace, ofwhich the followinglis specification..v4

This invention relates' to boringbraces yand. has particular reference to that variety 1,0.,of brace which vhas an offsetfor eccentric l bend or sweep vprovided with a hand grip for imparting circular motionv to the brace 4 and to the boring tool used therewith.

The'objectof the invention is to provide meanswhereby the bracemay -be used to bore holes having perfectly vertical lor hori-vr zontal axes or to bore holes at any desired angle tothe horizontal or vertical.

I have illustrated my invention by means of the accompanying drawing which forms part of the speciiicatiomvan'd in which,

Figure 1 is an 4exterior side view. Fig. 2

is a plan view.- Fig. 3 is avertical section,'

-on its upper end a leveling device 7, which consists of'a carrying portion 8in which are inserted spirit level glassesQ and 10.

The lower horizontal portion of the brace frame is itted Iwith ashaft housing 11 provided with journals 12 and 13at either end which carry the shaft.14. This shaft is provided at either end with-bevel pi'iiions 15 and 16, which mesh respectively with bevel gears 17 and 18 carried by the hand'gi'ip 2 and spindle 6. The ratio between the' two sets of gears 15Iand 17 and 16 and 18 is the saine. from. which, as a consequence, thespindle 6 will have the same absence of revolution on the chuck aXisas. does the-hand grip 2 when`the Vbrace is used. By thus causing' the leveling device -to have such relative motionl to the chuck that it` will be at rest in respect to the eye of the operator, the level glasses may be kept at all times under clear observation bythe operator, so that he may detect at once any variation evasi-irriteren, ntsritror 'on 'Mier i speeineaiiirof tenis raient- Patnte '.iipiiiieaia'sieaianuary'25, i912. serial No. 673,333.

I' i. fri-orni-thefparticularj angle EENT 'OFFon- Sites-th@ heefebe bored:

For vertical boring the lepel *lObe'ing at i right "angles 'toeach other-taff..

ford lmeansl for 'instant 'detection-jatvany va.- l;

lriationfroi'n the vertical :ineither-:directiona y., u i

For horizontal yboring; fthe liuhble ,inl glass 10 takesits position at the point 21 instead -of at the point 20 .as in the vertical'.

For boring holes at differentangles between horizont-al and vertical, it. is only necessary to incline the brace 'unt-il the bubble in .level glass 10 coincidesl with the desired graduavtions thereon between positions 20 and 21.

The :housing 11 is secured to the lower horizontal portion' ofthe brace framel by means of spring clips 24 and 25 which grip the brace frame in a manner' to holdy the spindle 14 in correctV alinement and at the same time admit of ready removal or adjustment of the entire housing,fl spindle and the ygears by thegra'sp of the hand alone. In like manner the spindle 6 with its gear 18 and leveling devicefon its upper endl is readily removed or replaced without the use of tools. lVhen'the parts are thus removed the l,boring 'brace diers. from the ordinary form in nothing beyond the possession of the gear 17 on the hand grip 2 andthe axial bore 5 inthe upper end of the chuck head. In this way the-boring brace may be used in the same manner as any other without being encumber'ed or complicated by lthe addition of complex or ungainly parts, being ready, however, at all times to. be equipped with the leveling device and gear connection by the simple manlual operation ofvthrusting the housing 11 andthe spindle 6 into their respective positions.

The advantage of a boring brace which in ordinary use differs iii no essential froml such as are commonly used, but which can -be converted immediately and with facility iiito a boring brace which can be used for the accurate boring in vertical and horizontal ldirections or atI any desired angle. will be sufficiently obvious without further 'elaboration than my description as set forth.

It will also beobvious that while I have described only one form of my invention the same may be embodied in various apparatus involving a similar principle or inode of operation, all of which are. apparent in this invention and included within the meaning of the appended claims.

" rlatil claim is:

fa revoluble hand grip thereonand a bit chuck, the coinbination'of a spindle in axial alinen'ient with' the chuck, a. leveling device mounted on said `spindle 'and gear connections between the spindle andv said hand glip- 24.111 a a revoliible handv grip thereon and abit cliuck,.tl ie combination of a spindle in axiale ,y al'inenient With the chuck-,a leveling device carried by said spindle and gear yconnections between the spindleand saidy hand grip, said gear connections comprising gears y mounted on said hand -gripvan'd said spindle,

boring brace having abrace frame,

bevel vpini'ons meshing with each of said gears andv a shaft connecting said pinions and revolving therewith. .A

3; 'In a boring brace having a brace frame, a revoluble hand. grip' thereon and a bit chuck, y,the combination ofa spindle in axial alinenient with .the chuck, a leveling 'device mounted on said spindle, and gear con# n'ections 4between the spindle and said hand grip, 'said gear connectionsl beingl arranged;

in a manner to neiitralizerotation of4 said spindle. Y v 'DILLAR-D REDMON lli'tnesses:

j E, .MifCoLroRm SPENCERHEATH. 

